[Increase of serum procalcitonin levels during a neuroleptic malignant syndrome].

When fever occurs in a patient treated with a neuroleptic, the diagnosis of a neuroleptic malignant syndrome is difficult to differentiate to that of an infectious event. Among inflammation biomarkers of inflammation, serum procalcitonin levels increase both quickly and specifically during a bacterial infection. We report the first case of a neuroleptic malignant syndrome associated with a significant increase of serum procalcitonin levels, without concomitant septic syndrome. The neuroleptic malignant syndrome might be a non-infectious clinical situation associated with an increased serum procalcitonin concentration.